[Mozilla Enterprise] Unable to select/copy entries from the cert viewer

[Robert Cooper]

In Firefox 78.3.0esr on Linux Mint, I am unable to select and copy 
entries from new "view certificate" (about:certificate) interface.  In 
particular, I used to be able to select and copy the SAN entries, which 
is rather useful when managing certificates with our provider.  Now I 
can only select a single line at a time which is rather useless when 
handling a cert with 75+ SAN records.

Is there either a way to revert to the old "view certificate" dialogue, 
or fix the new one so it's actually useful? Or do I have to depend on 
Chrome/chromium (again) for something else that used to work in Firefox 
and got broken for no justifiable reason?

Thanks,
Robert Cooper